Planograph co



W IRE TWISTING MACHINE. APPLICATION FILED JUNE 10. 1916.

Patented July 15, 1919.

2 SHEETSSHEET 1- A FOR/V51;

THE COLUMBIA FLANDGRAPH co WASHINGTON, D. C.

J. COGOZZO.

WIRE TWISTING MACHINE.

APPLICATION FILED JUNE I0; 191s.

Patented July 15 1919.

2 SHEETSSHEET 2.

IN if N TOR & ill I W EF W 7 THE COLUMBIA FLANOGRAPH co.. WASHINGTON, D. c.

if Ii JOSEPH COGOZZO, OF ROCHESTER, NEW YORK, ASSIG'NOR TO AMERICAN PIANO COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

WIRE-TWISTING MACHINE.

Specification of Letters Patent.

Patented July 15, 1919.

Application filed June 10, 1916. Serial No. 102,852.

To all whom it may concern:

Be it known that I, JOSEPH Cocozzo, a citizen of the United States, residin at Rochester, in the county of Monroe, tate of New York, have invented an Improvement in Wire-Twisting Machines, of which the following is a specification.

This invention relates to improvements in machines for forming wire loops, particularly such loops as are usually formed at the ends of piano string wires for the purpose of fastening the strings to the hitch pins of a piano. The principal object of the invention is to provide a machine whereby these loops may be formed most expeditiously, in a minimum of time, and by the use of as little Wire as possible; thereby effecting a saving in material and labor.

The invention will be hereinafter clescribed by reference to a machine showing a preferred embodiment of the invention.

In the accompanying drawings,

Figure 1 is a side elevation of a machine constructed in accordance with my invention;

Fig. 2 is an end elevation of the machine of Fig. 1; and

Figs. 3 to 9 inclusive are detail views of the jaws of the machine of Fig. 1, and illustrating several stages in the formation of the loop.

In the formation of the loop a portion of the piano string wire is first bent back upon itself to form an open loop having two substantially parallel runs. The open loop so formed is then placed over a twisting hook or other suitable device to impart, at the proper time, a rotary motion to the looped end of the wire. It is desired to twist together the parallel runs of the piano string wire for some distance from the end, thus forming a closed loop, and thereafter to coil a portion of the free end of the piano string wire about the main run of the wire to complete the formation of the finished loop. For the proper engagement of the parallel runs of the open loop and for the proper guidance of the wire in the formation of the twisted and, coiled parts of the completed loop, a pair of cooperating jaws are herein provided, the construction and arrangement of which will behereinafter more fully described.

In the present embodiment of the invention a jaw 1 is shown as being mounted in fixed position upon a forwardly extending bracket or anvil 8 of a base 4 of the machine. A cooperating jaw 2 is herein shown as movable relatively to the jaw 1. Means are provided for moving the jaw 2 toward or away from the jaw 1, the same being herein shown as a lever 5, to which the jaw 2 is attached at its outer end, fulcrumed at 6 in a lug 7 extending upwardly and rearwardly from the base 4. It will thus be seen that the rotation of the lever 5 about its fulcrum in a clockwise direction, will, if continued far enough, cause the jaws 1 and 2 to engage each other and to hold firmly any material which may be placed therebetween.

Means may be provided for operating the jaw carrying lever 5, the same being herein shown as a connecting rod 8 mounted upon a rock shaft 9 which is journaled between a pair of arms 10 rigidly secured to the base 4 and extending rearwardly therefrom. The connecting rod is connected by suitable means to the lever 5, herein shown as a link 11 pivoted to the lever 5 at 12 and adjustably secured to an eccentric collar 32 by means of a screw-threaded stud bolt 13. It will thus be apparent that upon the rotation of the shaft 9 from the position shown in the drawings, the jaws 1 and 2 will be brought together, and that upon the return of the shaft 9 to the position shown,vthe jaws will be separated one from the other. As a convenient means for operating the shaft 9 a handle 14, extending toward the front of the machine, is provided.

Any practicable mechanism may be employed to position a twisting hook 15 in proper-relation to the jaws 1 and 2 and preferably the twisting hook is attached to a machine which will automatically, upon the release of suitable clutch mechanism, rotate the hook through any number of desired revolutions.

Such mechanism is well known in the art and, therefore, is not herein angle bend in the wire automatically upon being brought together, prior to the'twisting of the wire by the hook 15. The particular form of jaw herein shown for the purpose of illustration, in the "case of the lower jaw 2, comprises a rectangular body portion 16 (see Figs. 3 and 4) having a projection 17 integral therewith and extending" 19 may be formed in the upper-surface of the projection 17 closely adjacent the stop wall 18, for? the purpose of guiding the shorter parallel run of the wire prior to: the formation of the closed" loop. Preferably the forward edge of the; projection 17 is slightly rounded or beveled: as shown, for the purpos'e o'f forming th rightangle bend in the short parallel runo'f wire; Also ris ing' from the base-'16-ofthejaw-'2 is a stop 20 lying'alongth'e opposite edge of the base 16 and adapted-te-fonmihcoo eration with the adjacent wall of the-stop 17 a guideway for the main run of the plane stringswire. Inthe base 16; adjacent and in front of the projection 17 is=a groove215which will=be later referred to.

The eeepereting mevable jaw member& comprises a substantially reetangularbedy portion having a front wall 22" step wall23' and formed with aree'e'ss te receive the upwardly extending stop portion 20 of the lower jaw 1. A depending flan e- 24 is rovided tdfitlfitOth betweenthe stop 20 and the projection 17" of the lower jaw when the aws are brought t'cige'the'fi In the-front-wall 22 of the upper jew be located a vertically disposed roove-25 substantially in alinem'ent-with the of the upwardly eXtendihgstopwall- 18 of the jaw 1. The purpose and functions of this groove tog'etherwith' a notch 26 formed in the lower face ofthe' flange 24 will be later described.

The completed loop is shown in Fig: 9"and therein the main length of the wire is indicated by the numeral 27; the loop by the numeral 28, the shorter parallel run by the numeral 29, and thatportioh of the wire which is coiled upon the'ni'aih length of wire by the numeral 30. Thisfigure' shows a preferred form ofcompletedloop'aiid it will be seen thatthereintheportions 27 and 29 of the wire have beentwiste'diipon each other from the loop to a" point adjacent-the edge ofthe jaw member shown in'that' figure, and that thereafter the portion 3Uhas been coiled upon the portion 27; These parts of the wire are. correspondinglynumbered throughout the preceding figure -end in the description of the operation of the apparatus will be so referredto'. 4

In the operation of theab'ove described machine in accordance with themethod herein disclosed, the machine isnnohnte'd, preferably, at a considerable distahcef'ro'm a support for a supply of piano string wire.

A portion of the leading end of the wire, of suflicient length to form the twisted and coiled portions, is bent back-upon the main or standing part of the wire thereby formin a' -bight or open loop. The open loop so formed is placed over the twisting hook 15 as shown in Fig. 3 so that the standing portion of the wire 27 lies in the guide space between the sidewall of the projection 17 and the inner wall of the projection 20. The shorter run 29 of the wire is disposed alongthe outer face of'the flange 18 tolie partially within the groove 19.- The 006pereting jaws and the wire are then substantially ii'rthe position'shown in Fig. 4 of the drawings.- 5

Thereupon the handle 14 is rotated to bring'the upper jaw 2' dawnupon the lower jawi The'iiiner corner of the portion 22 of the upper jaw 2will then engage the shorter run 29 of'the wire substantially as shown ifi'Fig; 5 and will operate to form a rightangular'beht-up portion 30 which will lie substantially within'the groove 25whe'n the jaws have been brought fully together. Uponthe further movement of the handle' 14 the two substantially parallel runs of wire 29 and- 27 will be'firmly clamped between upper jaw 22 and lower member 16. There'u'po'n the twisting mechanism is operated; preferably about four revolutions, to twist onerun of the wire with'the other and the result will be substantially that shown inFig. 6L

Thetwo runs 29 and 27 having thus" been twisted together the handle 14 is moved slightly toward its former p'dsition thus.

separating'the twojaws and releasing the pressure upon the parallel runs of wire. Thet'ensio'ii of the twisted wir'e'w'ill there'- upon cau se the right angular bent-up portion 3(lto snap down andenge-ge the abutment 16 of the lower j aw member substan tially along the guiding groove 21 as shown in Figs. 7 and 8. The jaw Ihember 2 is then brought down to bear lightly against the two wires in this position and thetwistiilg hook 15 is further rotated. Upon the rotation of the twisting hook as last described the entire length of wire from the hook to the main supply of wire will be twisted upon itself, this imparting a rotation to that portion of the main length of wire held loosely between'tliefjaws'l and 2. This rotation of the portion of the wire thus lightly engaged by the jawswill operate to coil the right angular bent=up portion 30 about th'e'm'ain or standing length of wire 27 in the manner shown in Fig. 9. The portion of the wire 30 l'ying along the groove 21 will be guided'thereby and by the notch 26s'o' that it will be neatly c'oiledu'po'n the main run 27. This second rotation of the twisting-hook may be continued longenough to coil the entire end 30 around the main run 27 and thus obviate the necessity for cutting off and thereby wasting any portion of the wire.

It will be understood that the present invention as it relates to the machine may be variously modified and embodied within the scope of the subjoined claims.

I claim as my invention:

1. A device of the character described comprising a rotatable wire-twisting. memher; a wire-receiving member having means to clamp the wire in a line with the axis of rotation thereof; and an abutment extending from said line and substantially co-planar therewith to resist revolution about said axis of wire portions not substantially co-linear therewith.

2. A device of the character described comprising a rotatable wire-twisting member; a wire-receiving member having means to clamp the wire in a line with the axis of rotation thereof; an abutment extending from said line and substantially co-planar therewith to resist revolution about said axis of wire portions not substantially 00- linear therewith; and guiding means cooperating with said abutment to maintain the direction of the wire portions so disposed.

8. A device of the character described comprising a rotatable wire-twisting memher and a wire-receiving member comprising jaws releasably to clamp a doubled wire su stantially in a line with the axis of rotation of said Wire-twisting member, said jaws embodying a wire-bending mechanism to deflect a portion of Wire from said line and an abutment extending from said line and substantially co-planar therewith to resist revolution of said portion about said axis.

4. A device of the character described comprising a rotatable wire-twisting member and a wire-receiving member comprising jaws to clamp a doubled wire substantially in a line with the axis of rotation of said Wiretwisting member, said jaws embodying a wire-bending mechanism to deflect a portion of wire from said line and an abutment extending from said line and substantially co planar therewith to resist revolution of said portion about said xis, and guiding means cooperating with said abutment to maintain the angular relation of the deflected portion to said axis.

5. A wire-receiving member for a wiretwisting mechanism comprising means releasably to clamp a doubled length of the wire against rotation about its longitudinal axis and an abutment to resist revolution about said axis of a portion of the wire disposed transversely to said axis, and guiding means associated with said abutment to maintain the angular relation to said axis of a portion of the wire so disposed.

6. A wire-receiving member for a wiretwisting mechanism comprising means releasably to clamp a doubled length of the wire against rotation about its longitudinal axis and an abutment to resist revolution about said axis of a portion of the wire disposed transversely to said axis.

7. A wire-receiving member for a wiretwisting mechanism comprising jaws releasably to clamp a doubled wire against rotation about its longitudinal axis, said jaws embodying a wire-bending mechanism to de flect a portion of wire to a position transverse to said axis and an abutment to resist revolution about said axis of said deflected portion of the wire.

8. A wire-receiving member for a Wiretwisting mechanism comprising jaws releasably to clamp a doubled wire against rotation about its longitudinal axis, said jaws embodying a Wire-bending mechanism to deflect a portion of wire to a position trans verse to said axis, an abutment to resist revolution about said axis of said deflected portion of the wire, and guiding means cooperating with said abutment to maintainthe angular relation of the deflected portion to said axis.

In testimony whereof, I have signed my name to this specification this sixth day of June, 1916.

JOSEPH COGOZZO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

